title: Polyol Process Synthesis of Monodispersed FePt Nanoparticles.
abstract: Monodispersed FePt nanoparticles are synthesized by reduction of iron(II) acetylacetonate and platinum(II) acetylacetonate with 1,2-hexadecanediol as the reducing reagent in the polyol process. As-prepared FePt nanoparticles are chemically disordered with fcc phase. Transmission electron microscopy (TEM) images show a self-assembled particle array with an average particle size of 3 nm and a standard deviation about 10%. The transformation from chemically disordered fcc to chemically ordered L10 phase is achieved by annealing at 650 degrees C for 30 min in Ar atmosphere where the oxygen level is less than 1 ppm. Magnetic hysteresis measurements show a coercivity of 9.0 kOe at 293K, and 16.7 kOe at 5 K for the annealed FePt nanoparticles.
authors.affiliation: Seagate Research, Pittsburgh, Pennsylvania 15222.
authors.forename: Chao
authors.initials: C
authors.lastname: Liu
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Wu
authors.forename: Timothy
authors.initials: T
authors.lastname: Klemmer
authors.forename: Nisha
authors.initials: N
authors.lastname: Shukla
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Yang
authors.forename: Dieter
authors.initials: D
authors.lastname: Weller
authors.forename: Anup G
authors.initials: AG
authors.lastname: Roy
authors.forename: Mihaela
authors.initials: M
authors.lastname: Tanase
authors.forename: David
authors.initials: D
authors.lastname: Laughlin